{"id":2819,"date":"2026-11-05T01:29:18","date_gmt":"2026-11-05T01:29:18","guid":{"rendered":"https:\/\/www.kingbaseglobal.com\/blog\/tech-blog\/design-converged-database-architecture-htap-acid\/"},"modified":"2026-11-05T01:29:18","modified_gmt":"2026-11-05T01:29:18","slug":"design-converged-database-architecture-htap-acid","status":"publish","type":"post","link":"https:\/\/www.kingbaseglobal.com\/blog\/tech-blog\/design-converged-database-architecture-htap-acid\/","title":{"rendered":"Design Converged Database Architecture_ HTAP, ACID &amp;"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/kingbase-bbs.oss-cn-beijing.aliyuncs.com\/qywx\/blogImage\/67ce2215-7f94-4ee9-9452-681cb85a6e2f.webp\" alt=\"Precision tools arranged on linen for technical tutorial\" \/><\/p>\n<h2>Prerequisites<\/h2>\n<p>Before implementing a converged database architecture using KingbaseES, ensure the following prerequisites are met. Note that specific version numbers, operating system compatibility, and hardware specifications (CPU cores, RAM, storage IOPS) must be verified against the official KingbaseES vendor documentation, as these are not detailed in the provided evidence.<\/p>\n<ul>\n<li><strong>Software Version<\/strong>: Verify the specific KingbaseES version supporting the required HTAP and vector retrieval features.<\/li>\n<li><strong>Operating System<\/strong>: Ensure the host OS is on the supported list for KingbaseES (typically enterprise Linux distributions).<\/li>\n<li><strong>Hardware<\/strong>: Confirm sufficient CPU and memory resources to handle mixed OLTP\/OLAP workloads without resource contention.<\/li>\n<li><strong>Storage<\/strong>: For KingbaseES RAC, ensure shared storage infrastructure is configured and accessible by all cluster nodes.<\/li>\n<\/ul>\n<h2>1. Deconstructing the Siloed Stack: Why HTAP is the Converged Alternative<\/h2>\n<p>The traditional enterprise data stack typically consists of a relational database for transactions, a separate data warehouse for analytics, and often a NoSQL store for unstructured data. This fragmentation creates significant operational friction. Data must be extracted, transformed, and loaded (ETL) from the transactional system to the analytical system. This process introduces latency, meaning business intelligence is rarely real-time. Furthermore, maintaining multiple database engines requires specialized skills for each technology, increasing administrative overhead and licensing costs.<\/p>\n<p>HTAP (Hybrid Transactional\/Analytical Processing) emerges as the converged alternative by processing both transactional and analytical queries on the same data. The primary benefit is the elimination of ETL latency. By querying operational data directly, organizations achieve real-time visibility into business metrics. However, convergence is not merely a logical unification of APIs. It requires a systemic design pattern where storage engines coexist physically. This co-location allows for consistent data views without the need for complex replication or synchronization layers.<\/p>\n<p>The decision to converge stems from the need to reduce infrastructure complexity. When transactional and analytical workloads share the same underlying data structure, data governance becomes centralized. Security policies, access controls, and audit trails apply uniformly. This reduces the attack surface and simplifies compliance reporting.<\/p>\n<h2>2. Architectural Core: Kernel-Level Fusion vs. Traditional ETL Convergence<\/h2>\n<p>To understand how convergence works, it is necessary to distinguish between logical unification and physical fusion. Traditional data integration often relies on ETL processes or data virtualization layers to stitch together disparate systems. While this provides a unified view, it does not eliminate the underlying data duplication or the latency inherent in cross-system queries.<\/p>\n<p>Kernel-level fusion represents a deeper architectural integration. In a converged database, the storage engine is designed to handle both row-based and columnar data formats within the same kernel. This means that transactional data, typically stored in row format for fast point lookups, can be accessed by analytical queries using columnar storage for fast aggregation. The transition between these formats happens internally, without requiring external ETL jobs.<\/p>\n<p>This approach breaks data silos at the source. Data is ingested once and made available for both immediate transactional processing and complex analytical exploration. The key technical advantage is the reduction of I\/O overhead. Since the data resides in a single location, query execution plans can optimize for both read-heavy analytical scans and write-heavy transactional updates. This requires sophisticated query routing and memory management to ensure that heavy analytical queries do not consume resources needed for critical transactions.<\/p>\n<p>KingbaseES implements this concept through multi-load collaborative processing. By supporting OLTP, HTAP, and vector retrieval within a single kernel, it allows enterprises to process diverse workloads without maintaining separate specialized databases. This convergence reduces the operational burden of managing multiple database instances and simplifies the overall data architecture.<\/p>\n<h2>3. Shared-Storage Active-Active Design: The RAC Advantage<\/h2>\n<p>A critical component of a robust converged architecture is high availability. In a distributed environment, a single point of failure can disrupt both transactional and analytical services. Shared-storage architectures, such as those found in KingbaseES RAC, offer a distinct advantage by decoupling compute from storage while maintaining data consistency.<\/p>\n<p>KingbaseES RAC utilizes a shared-storage design where multiple database nodes access the same physical storage. This architecture employs cache fusion technology to maintain consistency across nodes. Cache fusion allows nodes to share data blocks in memory, ensuring that all nodes see a consistent view of the data without excessive network traffic. This is particularly important for HTAP workloads, where transactional updates must be immediately visible to analytical queries running on other nodes.<\/p>\n<p>The active-active design enables multiple nodes to process read and write requests simultaneously. This provides load balancing, distributing the workload across the cluster to prevent bottlenecks. If one node fails, the others continue to operate, ensuring no single point of failure. This transparency to applications means that existing client connections can be redirected to healthy nodes with minimal disruption.<\/p>\n<p>For enterprises requiring high concurrency and high performance, this architecture offers scalability. As demand increases, additional nodes can be added to the cluster to handle the load. The shared-storage model also simplifies storage management, as data is not replicated across multiple independent storage systems, leading to lower storage costs and improved operational efficiency.<\/p>\n<p>To implement this architecture, architects must configure the cluster to support active-active scenarios. This involves setting up the shared storage infrastructure and configuring the database instances to participate in the cache fusion network. The control file in KingbaseES manages static initialization information and configuration data, updating automatically when parameters in <code>kingbase.conf<\/code> are modified. This automation reduces the risk of configuration drift across nodes.<\/p>\n<p><strong>Vendor-specific configuration required<\/strong>: Specific parameters for <code>kingbase.conf<\/code> and RAC cluster initialization must be verified with KingbaseES vendor documentation.<\/p>\n<h2>4. Resource Isolation: Managing OLTP\/OLAP Contention in Mixed Workloads<\/h2>\n<p>Running mixed workloads on a single engine introduces the risk of resource contention. Analytical queries often perform full table scans or complex joins, consuming significant CPU and memory. If these queries run on the same resources as transactional workloads, they can degrade the performance of critical business operations. Effective converged architectures must implement strict resource isolation to mitigate this risk.<\/p>\n<p>Resource isolation involves partitioning compute and memory resources to prioritize different types of workloads. For example, transactional queries can be assigned to dedicated resource groups with strict limits on execution time and memory usage. Analytical queries can be placed in separate groups, allowing them to utilize available resources without starving transactions. This ensures that high-concurrency transactions maintain low latency, even during heavy analytical processing.<\/p>\n<p>Query optimization also plays a role in managing contention. The database engine can prioritize transactional queries, ensuring they complete quickly. Analytical queries can be scheduled during off-peak hours or throttled if system resources are critically low. Additionally, indexing strategies must balance the needs of both workloads. Indexes that support fast point lookups for transactions should not significantly slow down analytical scans.<\/p>\n<p>While specific benchmark data for resource isolation in KingbaseES is not publicly available, the architectural principle remains consistent across converged databases. Architects should design their deployment with resource monitoring and alerting in place. This allows for real-time detection of contention and dynamic adjustment of resource limits. Testing under realistic mixed-workload conditions is essential to validate that isolation policies are effective.<\/p>\n<h2>5. Multi-Load Collaborative Processing: Unifying OLTP, HTAP, and Vector Retrieval<\/h2>\n<p>Modern enterprises face diverse data requirements. Beyond traditional transactions and analytics, there is a growing need to process unstructured data and perform AI-driven insights. A converged database architecture supports this diversity through multi-load collaborative processing. This capability allows a single engine to handle OLTP, HTAP, and vector retrieval tasks simultaneously.<\/p>\n<p>Vector retrieval is increasingly important for applications involving semantic search, recommendation engines, and AI assistants. Traditionally, this required a separate vector database, adding another layer of complexity to the data stack. By integrating vector capabilities into the converged database, enterprises can perform similarity searches on operational data without moving data to a specialized system. This reduces latency and simplifies data governance.<\/p>\n<p><strong>Technical Details for Vector Retrieval<\/strong>:<\/p>\n<ul>\n<li><strong>Embeddings<\/strong>: Ensure the application generates embeddings compatible with KingbaseES&#8217;s vector storage format.<\/li>\n<li><strong>Index Freshness<\/strong>: Configure regular index rebuilds or incremental updates to ensure vector indices reflect the latest data changes.<\/li>\n<li><strong>Retrieval Latency<\/strong>: Monitor query execution times for vector similarity searches to ensure they meet application SLAs.<\/li>\n<li><strong>Metadata Filtering<\/strong>: Use metadata filters to narrow down vector search results before performing similarity calculations, improving performance.<\/li>\n<\/ul>\n<p>The prerequisite for migrating to a unified engine is a thorough assessment of workload characteristics. Architects must identify the volume and type of data, the expected concurrency levels, and the specific query patterns. This assessment helps in sizing the hardware and configuring the database for optimal performance. It also highlights any specific requirements, such as support for semi-structured data formats like JSON.<\/p>\n<p>KingbaseES supports this multi-load processing by providing native capabilities for vector retrieval alongside traditional relational operations. This allows developers to write queries that combine transactional data with semantic insights. For example, a customer service application can retrieve customer transaction history (OLTP) and perform sentiment analysis on recent interactions (Vector) in a single query. This integration reduces the need for data movement and ensures that insights are based on the most current data.<\/p>\n<p><strong>Verify with vendor documentation<\/strong>: Specific SQL commands or API calls for enabling multi-model storage (e.g., JSON) and vector retrieval must be verified with KingbaseES documentation.<\/p>\n<h2>6. Validation: Ensuring ACID Compliance and Consistency in Distributed HTAP<\/h2>\n<p>Validating a converged database architecture requires verifying that ACID (Atomicity, Consistency, Isolation, Durability) properties are maintained across hybrid workloads. In a distributed environment, consistency is particularly challenging. Transactions must be atomic across nodes, and analytical queries must see a consistent snapshot of the data.<\/p>\n<p>The validation checklist for ACID compliance in a distributed converged setup includes the following steps:<\/p>\n<ol>\n<li><strong>Transaction Atomicity<\/strong>: Verify that multi-node transactions either commit or roll back completely. Test scenarios involving node failures during transaction execution to ensure no partial commits occur.<\/li>\n<li><strong>Consistency via Cache Fusion<\/strong>: In shared-storage architectures, cache fusion ensures that all nodes see the most recent committed data. Validate this by running concurrent transactional updates and analytical queries, checking that analytical queries do not see uncommitted data.<\/li>\n<li><strong>Isolation Levels<\/strong>: Confirm that the database supports the required isolation levels (e.g., Read Committed, Serializable). Test for anomalies such as dirty reads, non-repeatable reads, and phantom reads under high concurrency.<\/li>\n<li><strong>Durability<\/strong>: Ensure that committed data is persisted to stable storage. Verify that data survives node restarts and power failures.<\/li>\n<li><strong>Hybrid Workload Stability<\/strong>: Run mixed workloads for extended periods to detect any gradual consistency drift or performance degradation that might indicate underlying issues.<\/li>\n<\/ol>\n<p>KingbaseES RAC maintains consistency across nodes through cache fusion technology. This mechanism allows nodes to share data blocks in memory, ensuring that transactional updates are immediately visible to other nodes. This is crucial for HTAP scenarios where analytical queries must reflect the latest transactional state. Architects should leverage this feature to simplify consistency management, reducing the need for complex distributed consensus protocols.<\/p>\n<p><strong>Verification Commands<\/strong>:<\/p>\n<ul>\n<li>Run <code>SELECT * FROM pg_stat_activity;<\/code> to monitor active transactions and identify long-running queries.<\/li>\n<li>Execute a transactional update and immediately query the same data from another node to verify cache fusion consistency.<\/li>\n<\/ul>\n<h2>7. Failure Management: Troubleshooting and Rollback Procedures<\/h2>\n<p>Even with a robust architecture, failures can occur. Effective failure management includes troubleshooting strategies for performance issues and rollback procedures for migration failures. In a converged database, a failure in the transactional layer can impact analytical services and vice versa.<\/p>\n<p><strong>Troubleshooting<\/strong>:<\/p>\n<ul>\n<li><strong>Log Analysis<\/strong>: Check KingbaseES log files for errors related to cache fusion, network partitions, or storage I\/O.<\/li>\n<li><strong>Resource Monitoring<\/strong>: Monitor CPU, memory, and I\/O wait times. High I\/O wait may indicate storage bottlenecks in the shared storage infrastructure.<\/li>\n<li><strong>Lock Contention<\/strong>: Use diagnostic commands to identify locked resources and blocking transactions.<\/li>\n<\/ul>\n<p><strong>Rollback Procedures<\/strong>:<\/p>\n<ul>\n<li><strong>Backup<\/strong>: Ensure regular backups of the database schema and data are available before migration or major configuration changes.<\/li>\n<li><strong>Restore<\/strong>: In case of failure, restore the database from the last known good backup.<\/li>\n<li><strong>Configuration Revert<\/strong>: If configuration changes in <code>kingbase.conf<\/code> or RAC settings cause issues, revert to the previous configuration files and restart the service.<\/li>\n<\/ul>\n<p>For KingbaseES RAC, the application-transparent nature of the cluster simplifies failover. If a node fails, the cluster automatically redirects requests to healthy nodes. However, for major configuration changes or schema migrations, manual rollback plans should be in place. This includes backup strategies and the ability to restore previous versions of the database schema.<\/p>\n<h2>FAQ<\/h2>\n<h3>How do I validate ACID compliance for hybrid workloads in a distributed environment?<\/h3>\n<p>Validate ACID compliance by testing transaction atomicity across nodes, verifying consistency via cache fusion mechanisms, and checking for isolation anomalies under high concurrency. Use stress testing tools to simulate mixed workloads and monitor for any consistency drift.<\/p>\n<h3>What are the failure modes and rollback strategies for migrating to a converged database?<\/h3>\n<p>Common failure modes include resource contention leading to latency spikes and configuration errors in shared-storage setups. Rollback strategies involve maintaining parallel legacy systems during migration, using phased cutover plans, and ensuring that backups allow for quick reversion to previous states if SLAs are not met.<\/p>\n<h3>How can I verify real-time query performance without excessive data movement?<\/h3>\n<p>Verify performance by measuring end-to-end latency from data ingestion to query result. Use monitoring tools to track query execution times and resource utilization. Ensure that the converged engine is optimized for both row and column access patterns to minimize I\/O overhead.<\/p>\n<h3>What are the trade-offs between MPP and shared-storage architectures in converged databases?<\/h3>\n<p>MPP (Massively Parallel Processing) architectures offer horizontal scalability but can introduce complexity in data distribution and rebalancing. Shared-storage architectures, like KingbaseES RAC, simplify data management and provide strong consistency via cache fusion, but may have limits on storage I\/O bandwidth. Choose based on the need for scalability versus consistency and operational simplicity.<\/p>\n<h3>How does kernel-level fusion differ from traditional ETL-based data convergence?<\/h3>\n<p>Kernel-level fusion integrates transactional and analytical processing within the same database engine, eliminating the need for external ETL processes. Traditional ETL-based convergence moves data between separate systems, introducing latency and data duplication. Kernel-level fusion allows for real-time access to operational data for analytics.<\/p>\n<hr \/>\n<p><strong>\ud83d\udca1 More Resources<\/strong><\/p>\n<p>If you would like to dive deeper into KingbaseES and its application practices across various industries, we have compiled the following official resources to help you get started quickly and develop and operate with efficiency:<\/p>\n<ul>\n<li><a href=\"https:\/\/bbs.kingbase.com.cn\/\">Kingbase Community<\/a>: A one-stop interactive platform for technical exchanges, Q&amp;A, and experience sharing\u2014join forces with fellow DBAs and developers.<\/li>\n<li><a href=\"https:\/\/www.kingbaseglobal.com\/Solution-Oracle.html\">Kingbase Solutions<\/a>: One-stop full-stack database migration and cloud-native solutions, supporting smooth migration of multi-source heterogeneous data, ensuring high availability, real-time integration, and sustained high performance.<\/li>\n<li><a href=\"https:\/\/www.kingbaseglobal.com\/Customers.html\">Kingbase Case Studies<\/a>: Real-world user scenarios and implementation outcomes, showcasing KingbaseES&#8217;s outstanding capabilities in high availability, high performance, and IT adaptation.<\/li>\n<li><a href=\"https:\/\/docs.kingbase.com.cn\/en\">Kingbase Documentation<\/a>: Authoritative and comprehensive product manuals and technical guides, covering the entire lifecycle from installation and deployment to development, programming, and operations management.<\/li>\n<li><a href=\"https:\/\/www.kingbaseglobal.com\/Download.html\">Free Download<\/a>: Get the latest installation packages, drivers, tools, and patches, supporting multiple platforms and domestic chip architectures.<\/li>\n<li><a href=\"https:\/\/www.kingbaseglobal.com\/blog\/\">Digital Construction Encyclopedia<\/a>: Covers digital strategy planning, data integration, metrics management, database visualization applications, and more to empower enterprise digital transformation.<\/li>\n<\/ul>\n<p><strong>Open Source Resources:<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/github.com\/hgsandy\/Kingbase-docs\">GitHub &#8211; Kingbase-docs<\/a>: Kingbase documentation open-source repository\u2014Stars and contributions are welcome.<\/li>\n<li><a href=\"https:\/\/gitee.com\/hgsandy\/kingbase-docs\">Gitee &#8211; Kingbase-docs<\/a>: Domestic mirror repository for Kingbase documentation for faster access.<\/li>\n<\/ul>\n<p>Welcome to explore the resources above and begin your Kingbase journey!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Prerequisites Before implementing a converged database architecture using KingbaseES, ensure the following prerequisites are met. Note that specific version numbers, operating system compatibility, and hardware specifications (CPU cores, RAM, storage&#8230;<\/p>\n","protected":false},"author":669,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"meta_description":"","_kingbase_seo_description":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-2819","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.kingbaseglobal.com\/blog\/wp-json\/wp\/v2\/posts\/2819","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kingbaseglobal.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kingbaseglobal.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kingbaseglobal.com\/blog\/wp-json\/wp\/v2\/users\/669"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kingbaseglobal.com\/blog\/wp-json\/wp\/v2\/comments?post=2819"}],"version-history":[{"count":0,"href":"https:\/\/www.kingbaseglobal.com\/blog\/wp-json\/wp\/v2\/posts\/2819\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.kingbaseglobal.com\/blog\/wp-json\/wp\/v2\/media?parent=2819"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kingbaseglobal.com\/blog\/wp-json\/wp\/v2\/categories?post=2819"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kingbaseglobal.com\/blog\/wp-json\/wp\/v2\/tags?post=2819"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}